Reliablity and Validity

 
 
 
 
1. Can a test be reliable and not valid or vice versa? Why or why not?

The quality of any statistical analysis can be only as good as is the quality of the data upon which it is based; thus, the reliability and validity of data collected for use in statistical analysis is of paramount importance. Validity refers to the extent to which data a data collection instrument, or an analytical procedure (such as a test) measures what it is actually desired to measure. Reliability refers to the accuracy and precision of a data collection procedure or the outcome of an analytical procedure (such as a test). Validity, thus, is the extent to which differences found through a particular data collection procedure or analytical procedure reflects true differences among those variables being measured, while reliability refers to the capacity of an instrument or an analytical procedure to yield similar measurements under similar conditions.

To accomplish the objective of validity in measurement, it is necessary to have some standard that is external to the measurement procedure, in order to evaluate the validity of the procedure. Thus, if it were desired to measure the height of a number of individuals in terms of feet and inches, it would be necessary to have a measuring instrument that was calibrated in feet and inches. The validity of this measuring instrument calibrated in feet and inches would be determined based on its ability to accurately measure feet and inches in accordance

     
 
 
 
    

 

Related Essays

Male/Female Perceptions of Domestic Abuse .... However, since it has been in use by reputable researchers for a quarter of a century, it can be assumed that both reliablity and validity are acceptable. .... (2434 10 )

Italian Political Parties Most Americans' first exposure to .... This sometimes engaged them in internal contortions, as they sought to prove their reliablity to the other parties at the same time that they were seeking to .... (6785 27 )


Category: Misc - R
 
 
 
Common Topics
 
 
 
 
 
 
 
Click Here to Get Instant Access to over 32,000 Professionally Written Papers!!!
 
 
 
Join Now  
 
 
 
 
 
Saved Papers  
 
 
Save your essays here so you can locate them quickly!
 
 
 
Testimonials  
 
"This site is an excellent vehicle for quick referrences. Thanks a bunch!"
Carla T.
 
"Great site, I got a lot of new ideas I would have never thought of before."
Nate A.
 
"I love this site!!!"
Marie H.
 
"Thank you for making such a high quality site! Your papers are the best I have seen around"
Debbie B.
 
"Your site was very helpful and gave me the details I needed in order to complete my essay!!!"
Mike F.
 
 
 
 
Copyright © 2007 - 2014 Lots of Essays. All Rights Reserved. DMCA